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Natural vibration analysis of rectangular bottom plate structures in contact with fluid (CROSBI ID 218745)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Cho, Dae Seung ; Kim, Byung Hee ; Vladimir, Nikola ; Choi, Tae Muk Natural vibration analysis of rectangular bottom plate structures in contact with fluid // Ocean engineering, 103 (2015), 171-179. doi: 10.1016/j.oceaneng.2015.04.078

Podaci o odgovornosti

Cho, Dae Seung ; Kim, Byung Hee ; Vladimir, Nikola ; Choi, Tae Muk

engleski

Natural vibration analysis of rectangular bottom plate structures in contact with fluid

A simple and effective procedure for the natural vibration analysis of rectangular bottom plate structures in contact with fluid is presented. Structural part of the coupled hydroelastic problem covers thin and thick rectangular plates and stiffened panels with different framing types. The eigenvalue problem is formulated using Lagrange's equation of motion and taking into account potential and kinetic energies of a plate structure and fluid kinetic energy, respectively. Natural frequencies and modes are obtained applying the assumed mode method using the characteristic polynomials of a Timoshenko beam. Potential flow theory assumptions are adopted for the fluid and the effect of free surface waves is ignored. From the boundary conditions for the fluid and structure the fluid velocity potential is derived and it is utilized for the calculation of added mass using the assumed modes. The developed theoretical model is verified with several numerical examples dealing with the natural vibration of bare plates and stiffened panels in contact with different fluid domains. A comparison of the results with those obtained by a general purpose FEA software showed very good agreement, especially for the lowest natural frequencies that are actually most relevant for the structural design from the viewpoint of vibration.

Bottom plate; Mindlin theory; Stiffened panel; Vibration analysis; Potential flow; Added mass

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Podaci o izdanju

103

2015.

171-179

objavljeno

0029-8018

10.1016/j.oceaneng.2015.04.078

Povezanost rada

Brodogradnja, Građevinarstvo, Strojarstvo

Poveznice
Indeksiranost